Finding the Third Proportional to 13,066.50 and 19,721.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,066.50 : 19,721.50 = 19,721.50 : x
2. Step 2: Convert to fraction form
   13,066.50/19,721.50 = 19,721.50/x
3. Step 3: Cross multiply
   13,066.50x = 19,721.50 × 19,721.50
4. Step 4: Simplify right side
   13,066.50x = 388,937,562.25
5. Step 5: Solve for x
   x = 388,937,562.25/13,066.50
6. Step 6: Final answer
   x = 29,766.01